Oracle 查看 对象 持有 锁 的情况

同事在测试库上对一个表加字段，提示 ORA-00054， 资源忙。 应该是表对象的锁没有释放。

有关Oracle 锁的说明，参考：

​​ORACLE锁机制​​

用如下SQL 查看一下系统中相关对象上锁的情况：

/* Formatted on 2012/2/13 14:24:32 (QP5 v5.185.11230.41888) */
SELECT S.SID SESSION_ID,
       S.USERNAME,
       DECODE (LMODE,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (LMODE))
          MODE_HELD,
       DECODE (REQUEST,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (REQUEST))
          MODE_REQUESTED,
       O.OWNER || ' . ' || O.OBJECT_NAME || ' ( ' || O.OBJECT_TYPE || ' ) '
          AS OBJECT_NAME,
       S.TYPE LOCK_TYPE,
       L.ID1 LOCK_ID1,
       L.ID2 LOCK_ID2
  FROM V$LOCK L, SYS.DBA_OBJECTS O, V$SESSION S
 WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID AND object_name = 'xxxx';



SQL>alter system kill session 'SID,SERIAL#'
SELECT S.SID SESSION_ID,
       S.USERNAME,
       DECODE (LMODE,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (LMODE))
          MODE_HELD,
       DECODE (REQUEST,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (REQUEST))
          MODE_REQUESTED,
       O.OWNER || ' . ' || O.OBJECT_NAME || ' ( ' || O.OBJECT_TYPE || ' ) '
          AS OBJECT_NAME,
       S.TYPE LOCK_TYPE,
       L.ID1 LOCK_ID1,
       L.ID2 LOCK_ID2
  FROM V$LOCK L, SYS.DBA_OBJECTS O, V$SESSION S,V$ACCESS A
 WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID AND S.SID=A.SID AND A.OBJECT= 'PROC_VALIDATE_RULE_V3';


/* Formatted on 2012/6/6 10:59:49 (QP5 v5.185.11230.41888) */
SELECT distinct S.SID SESSION_ID,
       S.STATUS,
       S.USERNAME,
       DECODE (LMODE,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (LMODE))
          MODE_HELD,
       DECODE (REQUEST,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (REQUEST))
          MODE_REQUESTED,
       O.OWNER || ' . ' || O.OBJECT_NAME || ' ( ' || O.OBJECT_TYPE || ' ) '
          AS OBJECT_NAME,
       S.TYPE LOCK_TYPE,
       L.ID1 LOCK_ID1,
       L.ID2 LOCK_ID2,
       S2.SQL_TEXT
  FROM V$LOCK L,
       SYS.DBA_OBJECTS O,
       V$SESSION S,
       V$ACCESS A,
       V$SQL S2
 WHERE     L.SID = S.SID
       AND L.ID1 = O.OBJECT_ID
       AND S.SID = A.SID
       AND S2.HASH_VALUE = S.SQL_HASH_VALUE
       AND A.OBJECT = 'PROC_VALIDATE_RULE_V3';